Cyclic operation of the device of thermal energy extraction from the waste oil and gas wells

• Datum: 2017
• Hauptverfasser: Buchko, A., Kostikov, A.
• Format: Artikel
• Sprache: Russisch
• Veröffentlicht: Institute of Renewable Energy National Academy of Sciences of Ukraine 2017
• Schlagworte: borehole heat exchanger; geothermal power engineering; limit of sustainable production
• Online Zugang: https://ve.org.ua/index.php/journal/article/view/95
• Назва журналу: Vidnovluvana energetika

The development of alternative energy caused by the continuous rise in prices and the depletion of traditional energy resources. Today the increasing popularity is gained by geothermal power engineering due to the possibility of stable use of thermal energy. For each geothermal installation and for each operating mode there is a certain limit of sustainable production, after which the main parameters are reduced to such a level that continueduse of the installation is inexpedient.The goal of this article - research work borehole heat exchanger equipped in the waste oil and gas well, on variable modes to increase the limit of sustainable production for 20 years of operation.The mathematical model of thermal physical processes which occur during the selection of thermal energy, constructed on the basis of nonstationary heat transfer equation for the rock and twoquasi-stationary equations describing the heat exchange between the coolant and adjacent to the well rock site, and also heat exchange between the ascending and descending the coolant flows. The conducted researches have shown that the limit of sustainable production can be increased by applying the cyclic operation of the device. It is also advisable to use the well to provide a hot water supply. It is shown that in this case, it is necessary to use a storage tankin hot water supply system to prevent excess thermal power.